字符串处理及基础类库

System.out.println("秒数:"+date2.getSeconds());
}
}
2.Vtil.*;
public class MyVectorextendsVector{
public MyVector(){
super(1, 1); //指定capacity和capacityIncrement取值
String today="May 18,2009";
String todaysDayString=today.substring(4,6);
int todaysDayInt=Integer.parseInt(todaysDayString);
int nextWeeksDayInt=todaysDayInt+7;
System.out.println("The character at index 4 is:"+s.charAt(4));
System.out.println("The index of character N is:"+s.indexOf('N'));
String alphabet="ABCDEFGHIJKLMN";
}
elseSystem.out.println(o.toString());
System.out.println(sbislc);
String sbisup=sbis.toUpperCase();
System.out.println(sbisup);
String first="James";
String last="Gosling";
System.out.println(first+last);
System.out.println(inventor.replace('B','C'));
System.out.println(inventor);
int n=44;
System.out.println("n= "+n);
String strn=String.valueOf(n);
System.out.println("strn= "+strn);
public classStringTest{
public static void main(String [] args)
{
String s="ABCDEFGHIJKLMN";
System.out.println(s);
System.out.println("The string contains"+s.length());
System.out.println("月:"+date2.getDate());
System.out.println("日:"+date2.getDay());
System.out.println("小时数:"+date2.getHours());
System.out.println("分钟数:"+date2.getMinutes());
System.out.println("当前时间："+t.getTime());
}
}
（2）import java.util.*;
class HelloWorld {
public static void main(String args[]){
Date date1=new Date();
String temp=date1.toString();
System.out.println("toString:"+date2.toGMTString());
System.out.println("年:"+String.valueOf(Integer.parseInt(String.valueOf(date2.getYear()))+1900));
System.out.println("月:"+date2.getMonth());
String nextWeek=today.substring(0,4)+nextWeeksDayInt+today.substring(6);
System.out.println("Today's date is"+today);
System.out.println("Today's date is"+todaysDayInt);
System.out.println(alphabet);
System.out.println("The substring from index 4 to index 8 is"+alphabet.substring(4,8));
System.out.println("The substring from index 0 to index 8 is"+alphabet.substring(0,8));
int j=str.indexOf('s',i+1);
System.out.println("The next index of 's' is "+j);
int k=str.indexOf('s',j+1);
System.out.println("The next index of 's' is "+k);
}
public void addInt(int i){
addElement(new Integer(i)); }
public void addFloat(float f){
addElement(new Float(f));}
public void addString(String s){
addElement(s);}
System.out.println("next week's date is"+nextWeeksDayInt);
System.out.println("next week's date is"+nextWeek);
}
}
2.StringBuffer类练习
//StringBufferDemo.java
System.out.println("The substring from index 8 to end is"+alphabet.substring(8));
String sbis="StringBufferInputStream";
System.out.println(sbis);
String sbislc=sbis.toLowerCase();
return y+"年"+m+"月"+d+"日";
}
public String getTime() {
String s=hh+"时"+mm+"分"+ss+"秒";
return s;
}
public static void main(String args[]){
Time t=new Time();
System.out.println("当前日期："+t.getDate());
public void addCharArray(char a[]){
addElement(a);}
public void printVector(){
Object o;
int length = size(); //同capacity相比较
System.out.println("Number of vector elements is "+length+" and they are:");
temp=temp.substring(11,temp.indexOf('C'));
System.out.println(temp);
double sum=0.0;
for(int i=0;i<=10000000;i++){
sum+=i;
}
System.out.println(""+sum);
Date date2=new Date();
k=stIndexOf('s');
System.out.println("The last index of 's' is "+k);
System.out.println(str.substring(k));
String inventor="charles Babbage";
System.out.println(inventor);
</applet >
</html>
在浏览器打开StringBufferDemo.html文件，观察运行结果。